I go once a week.
I pay 65-75$ for a six week session. California pricing and NE Ohio pricing could be very different.
My trainer is a obedience/Rally Judge, Performs AKC CGC testing, and the TDI testing, Her breed is Leonbergers, but she has a GSD as well and has much experience with many different breeds.
And her students are out there competing and winning with their dogs, as well as having fun.
Lastly, she is progressive, in that she is all about praise and treats, but she also is not afraid to suggest various training aids like prong collars and the like. And she respects my wishes not to use them. She stays up to date with training techniques and offers articles and such that she has availability to that address issues, etc.
I prefer group sessions.
Bear Cub, Hepsi-Pepsi
Cujo2, Karma Chameleon
Ramona the Pest, Kojak -- who loves you baby?
Tiny Tinnie, Susie's Uzzi, Kaiah -- The Baby Monster.